The Grainger combination padlocks are durable, secure padlocks that offer keyless convenience and adjustable, personalized access. These padlocks feature a 3-number dialing combination that can be set by the user for secure access control. They are made from solid metal materials like hardened steel and zinc alloy for strength and weather resistance. The shackle diameter ranges from 5/16 inches to 1/2 inches to accommodate different security needs. Overall, these are reliable, customizable combination padlocks well-suited for securing lockers, gates, tool boxes, and more.